AMDHSA: More code object v3 fixes:

  - Make sure IsaInfo::hasCodeObjectV3 returns true only
    for AMDHSA
  - Update assembler metadata tests to use v2 by default


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@347001 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed